Monitor assembly for ground fault interrupter

Details Monitor assembly for ground fault interrupter Monitor assembly for ground fault interrupter

1974-08-13

1976-03-09

Miller, J. D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

317 33SC, 340253N, 340253S, H02H 328

Patent

active

039434095

ABSTRACT:
A monitor assembly comprising an indicator, such as a lamp, operable when a ground fault occurs in a protected circuit to show that the circuit has been interrupted. A separate power source is provided for the indicator circuit to keep the lamp lit throughout the time the protected circuit is interrupted, with electronic switching means in the indicator circuit to turn on the indicator lamp upon receipt of a voltage signal from the ground fault interruption circuit indicating interruption of the protected circuit. A test circuit is provided, also powered by the separate power source, to test operation of the ground fault interruption circuit. A manually operated switch is provided to energize the test circuit. For convenience, the indicator is described in this embodiment as a lamp but it may be any electrically operable indicating means, audible as well as visual.

REFERENCES:
patent: 3482236 (1969-12-01), Seney
patent: 3619723 (1971-11-01), Walden
patent: 3666988 (1972-05-01), Bellis
patent: 3680070 (1972-07-01), Nystuen
patent: 3700967 (1972-10-01), Hoss
patent: 3727080 (1973-04-01), Hanchett
patent: 3809985 (1974-05-01), Krause et al.

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